Locking device for intermittent driving mechanism.



AL MEHLFELDER. LOCKING DEVICE FOR INTERMITTENT nmvma MECHANISM.

magma APPLICATION FILED SEPT- 12, l9l3.

Patented Sept. 4, 191?.

if M-ro/v MEI/L FEL D ER ANTON MEHLFELDER, OF NEW YORK, N. Y.

LOCKING DEV'ICE FOR INTERMI'ITENT DRIVING MEC HANISM.

Specification of Letters Patent.

Patented se t. a, raw.

Application filed. September 12, 1913. Serial No. 789,436.

To all whom it may concern Be it known that I, ANTON Mnnnrnnonn,

a subject of the Emperor of Germany, rc-

siding at New York city, in the county and State of New York, have invented certain new and useful Improvements. in Looking Devices for Intermittent Driving Mechanism, of which the following is a clear, full, and exact description.

The object of this invention is to provide a locking device for an intermittent driving mechanism such, for instance, as is used for operating the film. of a motion picture machine.

As herein illustrated my improvement is applied to an intermittent motion mechanism which is fully set forth in my copending application, Serial No. 77 3,39 1, filed June 13, 1913.

The mechanism which I employ to intermittently operate the film consists of a continually operating shaft carrying on its axis and rotating with it a cylindrical cam wheel,

and I provide means for shifting the plane of said camwheel with relation to the axis of the driving wheel, the cam wheel being universally connected to the drive wheel on one side and pivotally connected to a shift ing frame controlled by a shifting handle on the other side.

The cylindricalcam wheel is provided, in this instance, with cam grooves in which )ins, in this instance, three in number, work. The intermittent motion shaft is provided with sprockets to advance the film.

The cam grooves in the cam disk act to rotate the operating disk, which carries the pins above mentioned, sufliciently to rotate the intermittent motion shaft the proper amount to advance the film for every revolution of the said cam disk. 1

To change the framing of the film, the

control handle is shifted to move the cam slots and the pins an increased distance, and maintain it in such relationship with the driving wheel until the control handle is again operated.

The function of the locking mechanism is to hold the operating disk fixed or immovable during the intervals of operation. As the pins will in time wear, loss of motion and vibration will result. The locking mechanism is designed to hold the operating disk steady when the pins wear.

The scope of my invention will be pointed t the claim In the accompanying drawing:

igure 1 is a plan view of my improved device.

Fig. 2 is a front view thereof.

cam disk and locking flange carried thereby.

Fig. 4: is a fragmentary end view of the cam disk shown tilted withrespect to the driving shaft, said view being broken away to show the universal connection between the cam disk and operating shaft.

Fig. 5 is a diagrammatic detail view of the locking flange and opera-tingdisk.

Fig. 6 is a diagrammatic view of the cam slot of the cam disk. i

Fig. 7 is a face view of another form of intermittent motion device and lock.

Fig. 8 is a sectional view thereof, the section being taken on a line 88.

As shown in the drawings, 1 indicates the continuously rotating shaft drivenby a gear 2, and pinion 3 fast on the shaft; 2 indicates the shaft for the intermittently moving film advancing reel 3. The shaft 2 is mounted in a frame 4 on one side of which frame secured to the shaft is a disk 5 provided with three studs a, Z) and c. Rotating axiallywith and free ofthe shaft 2 is the arm 6 with operating handle 7, to the free end of which is rotarily secured the cam wheel 8 by a stud 9 in the arm 6. The stud 9 has a uni versal joint at 10 with the continuously rotating shaft 1 and the cam is carried by the stud 9, so that on shifting the handle 7 as indicated by Fig. 4, the cam can be turned into a different plane with relation to the studs a, b and c, and move said studs in accordance with the extent of the movement thereby changing the framing of the picture. The cam wheel 8, as shown in Fig. 6, is provided with two grooves 13 and 14:, practically parallel and separated by a strip 15. The groove 13 opens to the outside of the cam wheel at 16, so that the roller Z) will ride up the slope at the point 16, rotate the shaft of the disk, force the roller a clown the inclined side, and into the groove 13, as shown in dotted lines at X, Fig. 41-. The roller 0 is free to swing to the left through an opening 17 at the side of the groove when the rollers a and Z) are traveling the part 16 of the cam, so that after passing the cam 17 the roller 0 will be in the position shown in Fig. 6 at X. The roller 0 will then be forced up the incline 18, the roller a depressed into the slot 1.4:, the roller 7,) merely being shifted '60 Fig. 3 is an enlarged detail view of the when they will occupy the position shown at Y in Fig. 6. Then the operation will repeat, the disk and rollers being given one-third of a revolution at every half revolution of the cam.

As can be seen, the operating disk 5 has six flat surfaces 19 against which a flange 20,- on the cam disks 8, bears.

Opposite the operating points of the cam slots 13 and 14, the flange 20 is cut away as at 21 and 22 to allow for the rotation of the disk 5. After the disk 5 has been operated the flange 20 will bear against a flat surface 19 and hold the disk 5 against vibration.

Figs, 7 and 8 illustrate a well known form of film operating mechanism consisting of a disk 23 having a cam 24 which actuates the operating disk 25.

In this form of device I mount upon the shaft 26 a disk 27, which, during the intervals of operation of the disk 25, engages a recess 28 therein and holds the said disk against vibration. The disk .27 is provided with a recess 29 opposite the cam 24.- which permits the disk 25 to be actuated.

I claim as my invention:

1. The herein described device consisting of a continuously rotating shaft, a cam mounted thereon, an intermittent moving shaft having studs or pins at one end thereof to engage with the cam for the purpose of receiving an intermittent motion from the face of the continuously rotating cam.

2. The herein described device consisting .ofja continuously rotating shaft, an intermittent moving shaft, a cam mounted on said first mentioned shaft to face with its outer periphery the center of the intermittent shaft, means carried by said intermittent shaft for engaging said cam, and means to tilt said cam without interfering with its regular motion.

"3. The herein described device consisting of a continuously rotating shaft, an intermittent moving shaft, a cam mounted on said first mentioned shaft to face with its a support for said shafts, and means for.

swinging said support to place said intermittent shaft at an angle relative to said continuously rotating shaft without disturbing the engagement between shafts.

The combination with a continuously rotating shaft and a second shaft, means actuated by said continuously rotating shaft,

and engaging said second shaft for intermittently rotating said second shaft, and means for tilting said second shaft relative to said continuously rotating shaft without disturbing the. engagement between said shafts.

6. The herein described device for producing an intermittent motion, consist ng of a continuously rotating shaft and a cam mounted thereon, an intermittently rotating shaft adjacent thereto and operated thereby.

at regular predetermined intervals, supporting means for said shafts, saidsupporting means arranged to be shifted before and.

during motion, and the shifting of said support being provided to swing the intermittent shaft around its center of rotation, whereby the intervals of intermittent inotioiis remain in fixed relation to the continuous rotating members.

Signed at New York city, New YOl'lQiJhlS 6th day of September, one thousand ninehundred thirteen.

ANTON MEHLFELDER.

Witnesses MICHAEL SEGEL, H. C. TUXBURY.

Copies of this patent mav be obtained for five cents each, by addressing the Commissioner .of Patents, Washington, I). 0. 

